PRACTICAL STUDIES
The Germination of Lettuce Seed as a Teaching Material for Upper Secondary School Biology. (1): A Laboratory Experiment of Germination with Colour Cellophane
1992 Volume 32 Issue 3 Pages 219-223
Details
1992 Volume 32 Issue 3 Pages 219-223
A simple method for photoreversibility ofgerminationin Grand Rapids lettuce (Lactuca sativa L.) seed was demonstrated using colour cellophane and overhead projector.Red and far-red light were provided by a halogen lamp (100V, 500W) ofoverhead projector with filters ofcolour cellophane. Lettuce seed showed completely reversible photoreaction at 28-30°C. In order to observe photoreversibility of germination in lettuce seed, itis the bestway to givelightirradiation, 0-6h after sawing at 28°C and 2-6h after thatat 30°C.
